many chinese people eaten so well and been so vocal in demanding both safe, affordable food and an environment worth living in. china's leaders will need to show creativity and balance to meet those demands. the chinese people are watching to see that they do. >> ifill: mary kay magistad writes about exploding watermelons and other food safety challenges for chinese consumers in a blog post. we also have a slide-show of images from china's burgeoning meat industry. you can find both links on our web site. again, the major developments of the day. marine general john allen, the top commander in afghanistan, came under scrutiny over e-mails and messages with a florida woman who triggered the david petraeus probe. and congress returned to work in a lame-duck session. lawmakers faced the challenge of preventing major tax hikes and spending cutin the new year. tonight's edition of "frontline" explores the polarizing issue of assisted suicide. kwame holman has the details. >> holman: in "the suicide plan," filmmakers uncover a surprisingly coordinated underground world of assisted suicide in america